共查询到20条相似文献，搜索用时 62 毫秒
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在大比例尺地形图测量工作中，相对于传统的方法，无人机倾斜摄影测量技术具有工作周期短、成本低的优点。其工作过程为：首先，通过野外航空摄影建立实景三维模型图；然后，用软件进行立体测图，对不能准确判读的部位进行野外调绘，对影像不清的部位用RTK方法补测数据；最后，对立体测图、调绘和补测数据进行处理，形成地形图。 相似文献
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单图像三维立体图简介 总被引：2，自引：0，他引：2
林存山 《物探化探计算技术》1996,18(1):52-59,70
立体图指的是在观察图画中的深度时，通过双眼的配合能够构造出一幅心理上的立体透视图来。人们常规的做法是使用一对像图来获得立体景色，这样的图要经适当的制作并要用双眼分别各看一张。近年来，借助于计算机产生的随机点图可用来勾绘出实物。这种随机点图如用单只眼睛观看时则是毫无意义的，但如用双眼观看时便可产生出立体景色。原先这样的随机点立体图似乎均要求制成两张图，但最近的工作表明将此种图合二而一的方法已获成功。 相似文献
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已开发出两种星奖科用于石油之间的微小化学。这种星状科以分析由气相色谱法分离的原油的Ｃ７烃为基础。首先，用这种Ｃ７图鉴别由水洗，生物降解作用、脱水等因素转化而引起的油的变化。在该图上标绘了根据降低生物降解灵敏度的顺序排列的８个比值，这些比值标为Ｔｒｌ－Ｔｒ８，这种图被称为Ｃ７油转化星状图。 相似文献
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本文介绍了用计算机辅助设计软件AUTOCAD与三维动画软件3DMAX来绘制峨嵋山地区块体图的方法，以此为例子讲述了将地形图改画面三维图的具体操作步骤，并进一步论述了用计算机绘制块体图的方法有着广泛的应用及其实用价值。 相似文献
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１∶５万区调运用填图新方法取得新进展劳子强（河南省区调队）“七五”期间地矿部在１：５万区调填图方法研究中，总结和创立一套适合我国地质特色的地质填图新方法，并在理论和实践上取得重大突破和进展。结合我省地质特点，我队在有关联测图幅开始运用新方法填图，在不... 相似文献
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我们曾在同一地层中，先后使用过三个厂制造的四种不同补强方式的孕镶金刚石钻头共八十多个。其补强方式有如下四种：1．上海砂轮厂钻头，内、外径各用12颗人造聚晶补强；2．二三三厂钻头，外径用6颗、内径用3颗φ2毫米针状合金补强，3．二三二厂钻头，内、外径各用12颗φ2毫米针状合金补强。针状合金镶焊在工作层之上，简称高镶补强型（图1），4．二三二厂钻头，内、外径各用12颗φ2毫米针状合金补强。但针状合金镶焊在工作层底唇上，简称平镶补强型（图2）。 相似文献
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一种重磁特征线的自动提取方法 总被引：1，自引：0，他引：1
本文介绍一种最大梯度追踪和旋转变换方法，可用于重磁数字图像特征线自动提取。该方法分两步进行，首先用最大梯度追踪法产生二态像素图，然后用旋转变换方法将二态像素图的栅格特征线转换成矢量特征线。此方法生成的文件可以与ＧＩＳ接口。 相似文献
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层序岩相古地理编图在岩相古地理分析中的应用 总被引：14，自引：0，他引：14
岩相古地理图既是记录和说明地质作用过程中构造演化和沉积历史的重要图件，又是反映沉积学研究现状的标志之一。早期岩相古地理研究中，经典的年代地层单元编图为古地理研究奠定了基础。以板块理论为指导、以岩石地层为单元的优势相编图是第二代岩相古地理编图的标志，层序地层学理论的提出和发展，为岩相古地理编图研究提供了新的思路。作者以川滇黔桂地区泥盆系为例，在对中国南方部分地区泥盆系海相层序地层学研究的基础上，选择了层序、体系域、层序界面或相关界面为编图单元，进行了编制层序岩相古地理图的尝试。实践表明，层序岩相古地理图能够用更客观的动态变化来反映盆地的充填和演化历史，具有等时性、成因连续性和实用性等优点。 相似文献
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Emily Keeble David I. Whiteside Michael J. Benton 《Proceedings of the Geologists' Association. Geologists' Association》2018,129(2):99-119
Pant-y-ffynnon Quarry in South Wales yielded a rich cache of fossils in the early 1950s, including articulated specimens of new species (the small sauropodomorph dinosaur Pantydraco caducus and the crocodylomorph Terrestrisuchus gracilis), but no substantial study of the wider fauna of the Pant-y-ffynnon fissure systems has been published. Here, our overview of existing specimens, a few described but mostly undescribed, as well as freshly processed material, provides a comprehensive picture of the Pant-y-ffynnon palaeo-island of the Late Triassic. This was an island with a relatively impoverished fauna dominated by small clevosaurs (rhynchocephalians), including a new species, Clevosaurus cambrica, described here from a partially articulated specimen and isolated bones. The new species has a dental morphology that is intermediate between the Late Triassic Clevosaurus hudsoni, from Cromhall Quarry to the east, and the younger C. convallis from Pant Quarry to the west, suggesting adaptive radiation of clevosaurs in the palaeo-archipelago. The larger reptiles on the palaeo-island do not exceed 1.5?m in length, including a small carnivorous crocodylomorph, Terrestrisuchus, and a possible example of insular dwarfism in the basal dinosaur Pantydraco. 相似文献
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Gilles Serge Odin 《Comptes Rendus Geoscience》2002,334(6):409-414
Lithostratigraphy, physicochemical stratigraphy, biostratigraphy, and geochronology of the 77–70 Ma old series bracketing the Campanian–Maastrichtian boundary have been investigated by 70 experts. For the first time, direct relationships between macro- and microfossils have been established, as well as direct and indirect relationships between chemo-physical and biostratigraphical tools. A combination of criteria for selecting the boundary level, duration estimates, uncertainties on durations and on the location of biohorizons have been considered; new chronostratigraphic units are proposed. The geological site at Tercis is accepted by the Commission on Stratigraphy as the international reference for the stratigraphy of the studied interval. To cite this article: G.S. Odin, C. R. Geoscience 334 (2002) 409–414. 相似文献
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The effect of water on accessory phase solubility in subaluminous and peralkaline granitic melts 总被引：4，自引：0，他引：4
The solubilities of columbite, tantalite, wolframite, rutile, zircon and hafnon were determined as a function of the water contents in peralkaline and subaluminous granite melts. All experiments were conducted at 1035 °C and 2 kbar and the water contents of the melts ranged from nominally dry to approximately 6 wt.% H2O. Accessory phase solubilities are not affected by the water content of the peralkaline melt. By contrast, solubilities are affected by the water content of the subaluminous melt, where the solubilities of all the accessory phases examined increase with the water content of the melt, up to 2 wt.% H2O. At higher water contents, solubilities are nearly constant. It can be concluded that water is not an important control of accessory phase solubility, although the water content will affect diffusivities of components in the melt, thus whether or not accessory phases will be present as restite material. The solubility behaviour in the subaluminous and peralkaline melts supports previous spectroscopic studies, which have observed differences in the coordination of high field strength elements in dry vs. wet subaluminous granitic glasses, but not for peralkaline granitic glasses. Lastly, the fact that wolframite solubility increases with increasing water content in the subaluminous melt suggests that tungsten dissolved as a hexavalent species. 相似文献
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Emmanuel Skourtsos Daniel Vachard Alexandra Zambetakis-Lekkas Rossana Martini Louisette Zaninetti 《Comptes Rendus Geoscience》2002,334(12):925-931
Some olistolites reworked in a Tertiary flysch of Mount Parnon (Peloponnesus, Greece) exhibit a Late Permian assemblage, dominated by Paradunbarula (Shindella) shindensis, Hemigordiopsis cf. luquensis and Colaniella aff. minima. This association corresponds to the Late Wuchiapingian (=Late Dzhulfian), a substage whose algae and foraminifera are generally little known. Contemporaneous limestones crop out in the middle part of the Episkopi Formation in Hydra, but they are rather commonly reworked in Mesozoic and Cainozoic sequences. The palaeobiogeographical affinities shared by the foraminiferal markers of Greece, southeastern Pamir, and southern China, are very strong (up to the specific level), and are congruent with the Pangea B reconstructions. To cite this article: E. Skourtsos et al., C. R. Geoscience 334 (2002) 925–931. 相似文献
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正20141596 Liu Yunhuan(School of Earth Sciences and Resources,Chang’an University,Xi’an 710054,China);Shao Tiequan Early Cambrian Quadrapyrgites Fossils of Xixiang Boita in Southern Shaanxi Province(Journal of Earth Sciences and Environment,ISSN1672-6561,CN61-1423/P,35(3),2013,p.39-43,3 illus.,20 refs.) 相似文献
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正20141719 Chen Zhijun(State Key Laboratory of Geological Processes and Mineral Resources,China University of Geosciences,Wuhan 430074,China);Chen Jianguo Automated Batch Mapping Solution for Serial Maps:A Case Study of Exploration Geochemistry Maps(Journal of Geology,ISSN1674-3636,CN32-1796/P,37(3),2013,p.456-464,2 illus.,2 tables,10 refs.) 相似文献
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正20140962 Chen Fenning(Xi’an Institute of Geology and Mineral Resources,Xi’an710054,China);Chen Ruiming Late Miocene-Early Pleistocene Ostracoda Fauna of Gyirong Basin,Southern Tibet(Acta Geologica Sinica,ISSN0001-5717,CN11-1951/P,87(6),2013,p.872-886,6illus.,56refs.) 相似文献
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正1.IGNEOUS PETROLOGY20142008Cai Jinhui(Wuhan Center,China Geological Survey,Wuhan 430205,China);Liu Wei Zircon U-Pb Geochronology and Mineralization Significance of Granodiorites from Fuzichong Pb-Zn Deposit,Guangxi,South China(Geology and Mineral Resources of South China,ISSN1007-3701,CN42-1417/P,29(4),2013,p.271-281,7illus., 相似文献
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正20141205Cheng Weiming(State Key Laboratory of Resources and Environmental Information System,Institute of Geographic Sciences and Natural Resources Research,CAS,Beijing 100101,China);Xia Yao Regional Hazard Assessment of Disaster Environment for Debris Flows:Taking Jundu Mountain,Beijing as an 相似文献
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正20141266Fan Chaoyan(Guangdong Provincial Key Laboratory of Mineral Resources and Geological Processes,Guangzhou 510275,China);Wang Zhenghai On Error Analysis and Correction Method of Measured Strata Section with Wire Projection Method(Journal of 相似文献